Looking around the org many people are starting to boost thier maximas, I was wondering though what would be the most effective turbo for our engines, t3, t3-t4. Sorry I when It comes to turbo setups I do not know everything, basicaly the basics. Also what turbo would do what , i.e. quick spool up...etc.etc. Thanks..

~SpeedCraize

 

"How much money ya got?"....

That's the real question...

 

I think he is trying to figure out which setup would give the least amount of spool up time and give the most power gains.

 

t3 or t3/t4 hybrids seem to be the most relevant choices for 3.0L+ engines. Ray Hall has a calculator as well if you wanna determine the AR sizes and all that junk too--->

http://www.turbofast.com.au/welcome.html

 

3000
6600
10

MAKE, TYPE, COMPRESSOR TRIM, TURBINE HSG A/R
Garrett, T3, 60, 1.06

 

what compressor did you actually go with??

 

That is what some people have said..the T04E or whatever that comes with the kit makes good peak numbers, but a smaller turbo would make more area under the curve and better overall power, but slightly smaller peak numbers. who knows though...I don't know that much about turbos.

 

A fairly large T4/TO4e


T3/TO4e would work better.

 

3000
6400
14psi

Garrett TO4--S--O----0.69000000000001

364BHP
33.5 lbs/min


I'd go with a 62-70 A/R though.

 

So far from what I can tell the t3-t4 seems to be a pretty good choice for our engines or is it, Garrett TO4,t3, T4/TO4e ???

This setup would be used on my daily driver, so I would not be looking for something that offers HUGE power gains that would only work well for the track, but something that offers no lag, quick spool, and provides power through the entire power band, I really do not care about PEAK horespower if we can not benefit from its performance. Id rather have something that is perfectly suited for th street,strip duty, and takes full benefit from OUR engine.

~SpeedCrazie

 

You definitely need a TO4E compressor, however the turbine side is your BIG decision.
1)T3 for faster spool up(sub 3000rpms, as low as 2000rpms). Supposedly, turbo95max is getting 5psi by 3000rpms.
OR
2)T4 for more top end power(supports 500+hp depending on trim wheel and housing a/r), but your not going to be producing boost(real boost) until 4000rpms. Check Nigels dyno for comparison and soon you'll have Kevs to back Nigels up.

You can play around with the turbine housing a/r to allow the T3 to have more top-end or the T4 to have less lag. This is the most difficult part to calculate IMO. I'm hoping between the org members and their dyno charts, I'll be able to decide what's the optimal combination for my VQ30DE-K.

Honestly, for our engines the T4/T4OE w/.60+ A/R is WAAAAAAY more than enough for stock internals to handle. The biggest question is how tolerant you are to lag. To me 4000rpms is a tad high, so my CURRENT choice would be a Ball Bearing center section on the T4/T4OE. This way I have the T4/TO4E output, yet spool closer to 3200-3400rpms. I do most of my city driving under 3500rpms, so I'm not going to be into the boost constantly and my blow off valve won't be wasting too much fuel. However, I do 90+% hwy driving so that's why I'm leaning towards the T4/T4OE.

The next monkey wrentch in my plan is Garretts latest GT series. These turbos cost approximatly double a T4, but are worth it IMO. They come with dual or triple ball bearing center sections, extremely long lasting reliability, and are in the low 80% efficiency range. I hope to figure out the capabilities of these units once I find their compressor maps. Everyone I've read about that's got one raves about how good they are.

 

:wow: holy informative batman =)